Shell Oil Comapny

Other

Shell Polypropylene Company

Richard A Kemp

David M Hamilton, Jr

Stanley E Wilson

Carma J Gibler

Linda R Chamberlain

Paul Richard Weider

Robert Charles Ryan

Thomas F Brownscombe

Charles Lee Edwards

Robert Q Kluttz

This invention relates to an ethylene oxide catalyst having improved initial selectivity which catalyst comprises silver, a promoting amount of alkali metal, a promoting amount of rhenium and a promoting amount of rhenium-co-promoter selected from phosphorus, boron and mixtures thereof, supported on a porous refractory support.

Ethylene oxide catalyst and process

The present invention relates to a catalyst suitable for oligomerization of olefins which is prepared by a process which comprises reacting a catalyst precursor ligand having a formula ##STR1## wherein R.sub.1 and R.sub.2 each independently is an alkyl, alkoxy, aryl, or aryloxy group having from about 1 to about 20 carbon atoms, with the proviso that R.sub.1 and R.sub.2 are not both aryl, or R.sub.1 and R.sub.2 together form a divalent hydrocarbon moiety, and X is 1,2-arylene, O-CH.sub.2, S-CH.sub.2, or Se-CH.sub.2 with a deprotonation source, a transition metal compound and a catalyst activator. The invention further relates to an oligomerization process utilizing this catalyst.

Oligomerization catalyst and process

This invention relates to an ethylene oxide catalyst having improved initial selectivity which catalyst comprises silver, a promoting amount of alkali metal, a promoting amount of rhenium and a promoting amount of rhenium co-promoter selected from phosphorus, boron and mixtures thereof, supported on a porous refractory support.

A high activity olefin polymerization catalyst catalyzes the production of polymeric lower .alpha.-olefin having good properties. The catalyst is produced from an organoaluminum cocatalyst, a selectivity control agent and a novel olefin polymerization procatalyst which is prepared by contacting a tetravalent titanium halide, an optional inert diluent, an electron donor and a novel solid procatalyst precursor obtained by contacting (a) a carbonated magnesium alkoxide of the general formula ##STR1## wherein R is a hydrocarbyl group having up to 12 carbon atoms and x is a number from 0.1 to about 2; and (b) at least one halogenating compound which is a non-transition metal halogenated compound or non-metallic halogenated compound. A process for polymerizing one or more .alpha.-olefins utilizing the novel high activity polymerization catalyst.

Process for olefin polymerization

This invention relates to an ethylene oxide catalyst having improved selectivity stability which catalyst comprises silver, a promoting amount of alkali metal, a promoting amount of rare earth, a promoting amount of rhenium and, optionally, a promoting amount of rhenium co-promoter selected from sulfur, molybdenum, tungsten, chromium and mixtures thereof, supported on a porous refractory support.

The present invention relates to a catalyst suitable for oligomerization of olefins which is prepared by a process which comprises reacting a catalyst precursor ligand having a formula ##STR1## wherein R.sub.1 and R.sub.2 each independently is an alkyl, alkoxy, aryl, or aryloxy group having from about 1 to about 20 carbon atoms, with the proviso that R.sub.1 and R.sub.2 are not both aryl, or R.sub.1 and R.sub.2 together form a divalent hydrocarbon moiety, and X is 1,2-arylene, O--CH.sub.2, S--CH.sub.2, or Se--CH.sub.2 with a deprotonation source, a transition metal compound and a catalyst activator. The invention further relates to an oligomerization process utilizing this catalyst.

Olefin polymerization catalyst

This invention relates to a process for the preparation of an ethylene oxide catalyst having improved selectivity stability which catalyst comprises depositing silver, a promoting amount of alkali metal, a promoting amount of rhenium and, optionally, a promoting amount of rhenium co-promoter selected from sulfur, molybdenum, tungsten, chromium and mixtures thereof, on a porous refractory support, at least partially drying the support, and thereafter depositing a promoting amount of nickel on the support.

Process for preparing ethylene oxide

Process for preparing ethylene oxide catalysts

Alkylene oxide adducts of organic compounds having active hydrogen atoms are prepared by a process which comprises contacting and reacting an alkylene oxide reactant comprising one or more vicinal alkylene oxides with an active hydrogen containing reactant comprising one or more compounds having active hydrogen atoms in the presence of a catalyst which comprises one or more compounds comprising a rare earth element and phosphorus supported on an inert porous support. The product alkoxylates are known to be useful, for instance, as nonionic surfactants, wetting and emulsifying agents, solvents, and chemical intermediates.

Alkoxylation process catalyzed by supported rare earth elements

Alkylene oxide adducts of organic compounds having active hydrogen atoms are prepared by a process which comprises contacting and reacting an alkylene oxide reactant comprising one or more vicinal alkylene oxides with an active hydrogen containing reactant comprising one or more compounds having active hydrogen atoms in the presence of a catalytically effective amount of a xerogel comprising one or more compounds comprising a rare earth element and phosphorus. The product alkoxylates are known to be useful, for instance, as nonionic surfactants, wetting and emulsifying agents, solvents, and chemical intermediates.

Catalyst of rare earth and phosphorus-containing xerogels for

This invention provides a catalyst and a process for the hydrogenation of conjugated diolefin polymers which first involves the polymerization or copolymerization of such monomers with an organo alkali metal polymerization initiator in a suitable solvent thereby creating a living polymer. The living polymer can be terminated by the addition of hydrogen. Finally, selective hydrogenation of the unsaturable double bonds in the conjugated diolefin units of the terminated polymer is carried out in the presence of an initiator and at least one rare earth compound of the formula

Selective hydrogenation of conjugation diolefin polymers with rare earth

This is a process for the depolymerization of conjugated diene polymers which comprises contacting the polymers with hydrogen in the presence of at least one bis(cyclopentadienyl)zirconium compound.

Depolymerization of conjugated diene polymers

This invention provides a catalyst and a process for the hydrogenation of conjugated diolefin polymers which first involves the polymerization or copolymerization of such monomers with an organo alkali metal polymerization initiator in a suitable solvent thereby creating a living polymer. The living polymer is preferably terminated by the addition of hydrogen. Finally, selective hydrogenation of the unsaturated double bonds in the conjugated diolefin units of the terminated polymer is carried out in the presence of at least one bis(cyclopentadienyl)titanium (+3) compound of the formula:

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Stafford, TX, United States of America

Richard A Kemp